MUŞ-KIZILAĞIÇ METAGRANİTİNİN BAŞKALAŞIMI VE YAŞI

Bitlis metamorfitleri içine Orta Devoniyen ile Alt Permiyen arasında yerleşmiş bulunan Muş-Kızılağıç lökograniti Alt Türoniyende (95 my), içinde bulunduğu kıtasal kabuğun sıkışması ile kataklastik metamorfizmaya uğramıştır. Orta basınç, düşük/orta sıcaklıkta gerçekleştiği düşünülen bu metamorfizma granitin ilksel mineralojik birleşimini ve dokusunu yer yer tümü ile silerek kuvars-feldispat-fengit gnaysların oluşumuna yol açmıştır. Üst Kampaniyende (75 my), Bitlis metamorfitlerinin üzerine yerleşen ofiyolit napı metagranitin gömülerek yeniden ısınmasına neden olmuştur.

Anahtar Kelimeler:

MUŞ-KIZILAĞIÇ, METAGRANİTİNİN, BAŞKALAŞIMI VE YAŞI

THE METAMORPHISM AND AGE OF THE MUŞ-KIZILAĞIÇ METAGRANITE

The Muş-Kızılağıç leucogranite intruded into the Bitlis metamorphic rocks sometime between Middle Devonian and Late Permian. It was cataclastically metamorphosed by regional metamorphism in Lower Turronian (95 my) following the compression of the continental crust within which it occurs. This medium-pressure and low-temperature metamorphism locally obliterated the primary mineralogy and texture of the granite producing quartzfeldspar-phengite gneisses. The emplacement of an ophiolite nappe over the Bitlis metamorphics in Upper Campanian (75 my) caused reheating of the metagranite through burial.

Keywords:

THE METAMORPHISM, THE MUŞ-KIZILAĞIÇ, METAGRANITE,

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